Dr. Takafumi Sassa Profile

Dr. Takafumi Sassa

at RIKEN

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Author

Publications (14)

Proceedings Article | 21 October 2015 Open Access

Absorption spectrum analysis based on singular value decomposition for photoisomerization and photodegradation in organic dyes

Yutaka Kawabe, Toshio Yoshikawa, Toshifumi Chida, Kazuhiro Tada, Masuki Kawamoto, Takashi Fujihara, Takafumi Sassa, Naoto Tsutsumi

Proceedings Volume 9652, 96520V (2015) https://doi.org/10.1117/12.2194404

KEYWORDS: Absorption, Polymethylmethacrylate, Molecules, Chemical analysis, Polymers, Absorbance, Polymer thin films, Optical pumping, Tunable lasers, Spectrum analysis

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Proceedings Article | 7 October 2014 Paper

Enhanced photoconductivity by melt quenching method for amorphous organic photorefractive materials

S. Tsujimura, T. Fujihara, T. Sassa, K. Kinashi, W. Sakai, K. Ishibashi, N. Tsutsumi

Proceedings Volume 9181, 91810C (2014) https://doi.org/10.1117/12.2058521

KEYWORDS: Diffraction, Composites, Heat treatments, Personal digital assistants, Quantum efficiency, Nonlinear optics, Chromophores, Organic semiconductors, Electro optics, Optical semiconductors

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Proceedings Article | 12 September 2013 Paper

Light-driven supramolecular chiral materials: photoinduced control of liquid-crystalline helical structures and non-destructive erasable molecular memory for photonic applications

Masuki Kawamoto, Natsuki Shiga, Kazuto Takaishi, Takafumi Sassa, Takashi Yamashita, Yoshihiro Ito

Proceedings Volume 8828, 882803 (2013) https://doi.org/10.1117/12.2021602

KEYWORDS: Nondestructive evaluation, Liquid crystals, Modulation, Molecular photonics, Ultraviolet radiation, Absorption, Switching, Phase shift keying, Temperature metrology, Visible radiation

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Proceedings Article | 26 October 2004 Paper

9-(2-ethylhexyl)carbazole for carrier transport and photorefractive materials

Tetsuya Aoyama, Jean-Charles Ribierre, Takafumi Sassa, Takashi Kobayashi, Tsuyoshi Muto, Tatsuo Wada

Proceedings Volume 5521, (2004) https://doi.org/10.1117/12.559242

KEYWORDS: Polymers, Luminescence, Chromophores, Liquids, Excimers, Absorption, Glasses, Electrodes, Electro optics, Optoelectronics

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Proceedings Article | 15 October 2004 Paper

Third-order nonlinear optical properties of soluble Cr(III)-dioxolene complexes

Shin-ichiro Noro, Takafumi Sassa, Tetsuya Aoyama, Ho-Chol Chang, Susumu Kitagawa, Tatsuo Wada

Proceedings Volume 5517, (2004) https://doi.org/10.1117/12.559114

KEYWORDS: Chromium, Absorption, Chlorine, Nonlinear optics, Bromine, Thin films, Coating, Solid state electronics, Metals, Magnetism

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Proceedings Article | 15 October 2004 Paper

Second- and third-order nonlinear properties of chiral phthalocyanine films

Tsuyoshi Muto, Takafumi Sassa, Tetsuya Aoyama, Mutsumi Kimura, Hirofusa Shirai, Tatsuo Wada

Proceedings Volume 5517, (2004) https://doi.org/10.1117/12.559340

KEYWORDS: Absorption, Second-harmonic generation, Active optics, Thin films, Nonlinear optics, Molecules, Crystals, Diffraction, Polymethylmethacrylate, Silica

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Proceedings Article | 8 December 2003 Paper

Photorefractive properties of conjugated carbazole polymers

Tetsuya Aoyama, Takafumi Sassa, Nicolai Mooren, Yoshihiro Imase, Atsushi Gunji, Takeyuki Sone, Masayoshi Tabata, Takashi Okubo, Tadaoki Mitani, Tatsuo Wada

Proceedings Volume 5216, (2003) https://doi.org/10.1117/12.510805

KEYWORDS: Polymers, Optical properties, Optoelectronics, Molecules, Absorption, Luminescence, Ionization, Electroluminescence, Optical parametric oscillators, Chromophores

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Proceedings Article | 10 November 2003 Paper

NLO properties of chiral phthalocyanine films

Tsuyoshi Muto, Tatsuo Wada, Takafumi Sassa, Mutsumi Kimura, Hirofusa Shirai

Proceedings Volume 5212, (2003) https://doi.org/10.1117/12.510798

KEYWORDS: Absorption, Thin films, Crystals, Molecules, Nonlinear optics, Diffraction, Silica, Near infrared, Copper, Molecular aggregates

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Proceedings Article | 18 December 2002 Paper

Nanoscale tailoring of dendrimers and polymers for photonic and optoelectronic applications

Alex Jen, Jingdong Luo, Hong Ma, Sen Liu, Lu Liu, Marnie Haller, Takafumi Sassa, Seok Kang, Larry Dalton

Proceedings Volume 4798, (2002) https://doi.org/10.1117/12.452122

KEYWORDS: Nonlinear optics, Chromophores, Polymers, Dendrimers, Fluorine, Optoelectronics, Thermography, Electro optics, Absorption, Polymethylmethacrylate

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Proceedings Article | 18 December 2002 Paper

Effects of side-chain modification on poling efficiency of highly polarizable nonlinear optical chromophores in electro-optical polymers

Sen Liu, Takafumi Sassa, Hong Ma, Alex Jen, Larry Dalton

Proceedings Volume 4798, (2002) https://doi.org/10.1117/12.452067

KEYWORDS: Chromophores, Polymers, Nonlinear optics, Magnesium, Chromatography, Silica, Sodium, Electro optic polymers, Electro optics, Bridges

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Proceedings Article | 16 January 2002 Paper

Thermally stimulated current and electro-optic responses in stable photorefractive polymers

Tetsuya Aoyama, Takafumi Sassa, Hiroyuki Sasabe, Tatsuo Wada

Proceedings Volume 4462, (2002) https://doi.org/10.1117/12.452733

KEYWORDS: Polarization, Photorefractive polymers, Polymers, Electro optics, Absorbance, Temperature metrology, Modulation, Refractive index, Thermodynamics, Glasses

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Proceedings Article | 7 December 2001 Paper

Highly efficient and thermally stable organic/polymeric electro-optic materials by dendritic approach

Alex K.Y. Jen, Hong Ma, Takafumi Sassa, Sen Liu, S. Suresh, Larry Dalton, Marnie Haller

Proceedings Volume 4461, (2001) https://doi.org/10.1117/12.449830

KEYWORDS: Chromophores, Nonlinear optics, Dendrimers, Polymers, Electro optics, Molecular interactions, Telecommunications, Modulators, Very large scale integration, Integrated optics

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Proceedings Article | 13 November 2000 Paper

Synthesis and properties of monolithic photorefractive carbazole-derived calix[4]arenes

Atsushi Gunji, Hiromi Kimura-Suda, Takafumi Sassa, Hiroyuki Sasabe, Tatsuo Wada

Proceedings Volume 4104, (2000) https://doi.org/10.1117/12.406478

KEYWORDS: Nonlinear optics, Chromophores, Molecules, Photorefraction, X-ray diffraction, Polymers, Second-harmonic generation, Bromine, Calorimetry, Polymer thin films

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Proceedings Article | 23 October 1998 Paper

Photorefractive effect from photo-induced orientation of a novel carbazole derivative

Takafumi Sassa, Tetsuya Aoyama, Yadong Zhang, Tatsuo Wada, Hiroyuki Sasabe

Proceedings Volume 3471, (1998) https://doi.org/10.1117/12.328151

KEYWORDS: Energy transfer, Polymers, Molecules, Photorefraction, Glasses, Polarization, Birefringence, Image processing, Diffusion, Modulation

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Showing 5 of 14 publications

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